Why this is important? Please help me

When conducting research for forming a hypothesis, which practice should historians follow?

Which of the following would be of greatest concern to a speaker in presenting to children? choose only two. 1. age 2. expectation 3. ethnicity 4. knowledge 5. gender

Match the description to the term. 1. ancient people of the british isles normans 2. possible location of oldest known writing emigrate 3. a variety of a language celts 4. the study of word forms indus valley 5. to leave one's country morphology 6. invaded england in a.d. 1066 dialect